Question

10x² +3x -7 = 0 ajuda ae

Answer 1

Resposta:

10x² +3x -7 = 0

Δ=b²-4.a.c

Δ=3²-4.10.(-7)

Δ=9+280

Δ=298

-b±√Δ/2.a

-3±√289/2.10

-3±17/20

x₁=-3+17/20

x₁=14/20 (÷2)

x₁=7/10 ( Que é igual a 0,7)

x₂=-3-17/20

x₂=-20/20

x₂=-1